Stainless steel gate valve

Abstract

The utility model relates to a stainless steel gate valve, and belongs to the technical field of gate valves, the stainless steel gate valve comprises a stainless steel valve body shell, flange connectors, a valve cover, a threaded valve rod and a valve plate, the opposite side faces of the stainless steel valve body shell are communicated with the flange connectors, and the valve cover is installed on the upper surface of the stainless steel valve body shell; the threaded valve rod is rotationally arranged between the valve deck and the bottom wall of the stainless steel valve body shell, and the valve plate is connected to the outer portion of the threaded valve rod in a threaded mode. The opposite side faces of the valve plate are movably attached to the inner wall of the stainless steel valve body shell. According to the stainless steel gate valve, when liquid leakage occurs, the arranged hydraulic assembly is started, the movable sealing structure is hydraulically pushed to be tightly attached to the valve body under the communication action of the hydraulic assembly and the movable sealing structure, sealing is adjusted, and meanwhile self-locking after adjustment is achieved through the locking assembly; and the situation that the valve plate needs to be detached to be replaced after liquid leakage occurs is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve, concretely is a stainless steel gate valve. BACKGROUND

[0002] Gate valve refers to the valve that the closing piece moves along the vertical direction of the center line of the passage, and the gate valve can only be fully opened and fully closed in the pipeline, and cannot be adjusted and throttled, and the gate valve is a kind of valve with wide application range, and the cut-off device with the general diameter DN≥50mm is selected to use it, and sometimes the cut-off device with very small diameter also selects the gate valve.

[0003] Among them, the gate valve is moved by rotating the valve stem to drive the valve plate to adhere to the valve body during use, the size of the liquid discharge opening of the gate valve is controlled, so that the purpose of controlling the liquid discharge is achieved, but the gate plate is easily impacted by particulate matter in the liquid flow and friction during movement, thereby causing wear of the valve plate and affecting the sealing effect;

[0004] Therefore, the present application designs a stainless steel gate valve that can adjust and seal when liquid leakage occurs to avoid disassembly and replacement of the valve plate, to solve this prior art defect. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the utility model provides a stainless steel gate valve, which has the advantages of being able to adjust and seal when liquid leakage occurs to avoid disassembly and replacement of the valve plate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a stainless steel gate valve, comprising a stainless steel valve body shell, a flange connector, a valve cover, a threaded valve stem and a valve plate;

[0007] The opposite side surfaces of the stainless steel valve body shell are communicated with the flange connector, the upper surface of the stainless steel valve body shell is provided with a valve cover, the threaded valve stem is rotatable between the valve cover and the bottom wall of the stainless steel valve body shell, and the outer thread of the threaded valve stem is connected with the valve plate;

[0008] The opposite side surfaces of the valve plate are provided with movable sealing structures that can adhere to the inner wall of the stainless steel valve body shell and seal the opening of the flange connector;

[0009] The movable sealing structure is provided with a locking assembly for locking after the movable sealing structure moves and adjusts;

[0010] The movable sealing structure is provided with a hydraulic assembly for driving the movable sealing structure to move.

[0011] As a preferred technical scheme of the utility model, the mobile sealing structure includes hollow ring seat installed on opposite sides of the valve plate and opposite to the opening of the flange connector, the hollow ring seat is externally communicated with multiple piston cylinders, the piston cylinders are internally slidably connected with sealing piston rods which are not separated from the piston cylinders, and sealing blocks are installed between the other ends of the sealing piston rods.

[0012] The above technical scheme facilitates the movable adjustment of the sealing blocks and improves the fitting effect of the sealing blocks and the inner wall of the stainless steel valve body shell.

[0013] As a preferred technical scheme of the utility model, the locking assembly includes multiple racks installed on the upper and lower ends of the left and right sides of the valve plate and multiple connecting rods installed on the opposite surfaces of the sealing blocks and oppositely arranged with the racks, the other ends of the connecting rods are installed with hollow seats, the hollow seats are internally installed with multiple stainless steel springs, and the other ends of the stainless steel springs are installed with tooth blocks engaged with the racks.

[0014] The above technical scheme facilitates the locking and fixing after the movable adjustment of the sealing blocks.

[0015] As a preferred technical scheme of the utility model, the racks are provided with multiple oblique tooth grooves distributed at equal distances, the oblique tooth grooves are arranged towards the opening of the flange connector at the oblique opening thereof, the oblique angle is thirty degrees, and the end of the tooth block located in the oblique tooth groove is matched with the shape and size of the oblique tooth groove.

[0016] The above technical scheme facilitates the movement of the tooth block along the oblique tooth groove and prevents the back movement.

[0017] As a preferred technical scheme of the utility model, when the sealing piston rods are in the fully stretched state in the piston cylinders, the tooth blocks are not separated from the racks.

[0018] The above technical scheme avoids the disengagement of the tooth blocks from the racks after the tooth blocks are disengaged from the racks in the fully stretched state.

[0019] As a preferred technical scheme of the utility model, the hydraulic assembly includes a hydraulic storage communication member and an extrusion member.

[0020] The hydraulic storage communication member includes a connecting pipe communicated between the hollow ring seats and a hydraulic oil storage cylinder installed on the surface of the valve cover, and a hose is communicated between the bottom surface of the hydraulic oil storage cylinder and the connecting pipe.

[0021] The above technical scheme facilitates the entry of the hydraulic oil into the hydraulic oil storage cylinder under the hydraulic action to push the sealing blocks to move.

[0022] As a preferred technical scheme of the utility model, the extrusion piece comprises a cover installed at the opening of the hydraulic oil storage cylinder, an electric push rod is assembled on the cover, and a sealing piston disc tightly combined with the inner wall of the hydraulic oil storage cylinder is installed at the push rod of the electric push rod.

[0023] By adopting the above technical scheme, the hydraulic oil is extruded, thereby providing hydraulic pressure.

[0024] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0025] When liquid leakage occurs, the hydraulic assembly is started, the mobile sealing structure is tightly combined with the valve body under the communication effect of the hydraulic assembly and the mobile sealing structure, and the locking assembly is self-locked after adjustment, so that the valve plate does not need to be disassembled and replaced after liquid leakage. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective view of the utility model;

[0027] Figure 2 It is a sectional perspective view of the utility model;

[0028] Figure 3 It is a plan view of the utility model Figure 2 ;

[0029] Figure 4 It is an enlarged view of A of the utility model;

[0030] Figure 5 It is a side perspective view of the utility model Figure 2 ;

[0031] Figure 6 It is a partial sectional perspective view of the utility model.

[0032] In the drawing: 1, stainless steel valve body shell; 2, flange connector; 3, valve cover; 4, threaded valve rod; 5, valve plate; 6, hollow ring seat; 7, piston cylinder; 8, sealing piston rod; 9, sealing block; 10, rack; 11, connecting rod; 12, hollow seat; 13, stainless steel spring; 14, tooth block; 15, connecting pipe; 16, sealing piston disc; 17, hose; 18, hydraulic oil storage cylinder; 19, electric push rod. DETAILED DESCRIPTION

[0033] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Please refer to Figures 1-2 The stainless steel gate valve in the embodiment comprises a stainless steel valve body shell 1, a flange connector 2, a valve cover 3, a threaded valve rod 4 and a valve plate 5.

[0035] The flange connector 2 is communicated with the opposite side surface of the stainless steel valve body shell 1, and a plurality of flange holes are arranged on the flange connector 2, so that the flange connector 2 is fixed and installed with a pipeline through fastening screws. The valve cover 3 is fixed and installed on the upper surface of the stainless steel valve body shell 1 through fastening screws. The threaded valve rod 4 is circumferentially rotatable between the valve cover 3 and the bottom wall of the stainless steel valve body shell 1. A sealing cylinder that tightly abuts and seals the threaded valve rod 4 is arranged on the stainless steel valve body shell 1. The valve plate 5 is threadedly connected to the outside of the threaded valve rod 4.

[0036] In the embodiment, the opposite side surface of the valve plate 5 is provided with a movable sealing structure that can abut the inner wall of the stainless steel valve body shell 1 and seal the opening of the flange connector 2.

[0037] It should be noted that the movable sealing structure comprises a hollow ring seat 6 that is fixedly installed on the opposite side surface of the valve plate 5 and opposite to the opening of the flange connector 2. A plurality of piston cylinders 7 are communicated with the outside of the hollow ring seat 6. A sealing piston rod 8 that is not separated from the piston cylinder 7 is slidably arranged in the piston cylinder 7. A sealing block 9 is arranged on the other end of the sealing piston rod 8.

[0038] Please refer to Figures 3-4 The movable sealing structure in the embodiment is provided with a locking assembly for locking after the movable sealing structure is moved and adjusted.

[0039] It should be noted that the locking assembly comprises a plurality of racks 10 that are fixedly installed on the upper and lower ends of the left and right side surfaces of the valve plate 5 and a plurality of connecting rods 11 that are fixedly installed on the opposite surfaces of the sealing block 9 and opposite to the racks 10 one by one on the upper and lower sides. A hollow seat 12 is fixedly installed on the other end of the connecting rod 11. A plurality of stainless steel springs 13 are fixedly installed in the hollow seat 12. A tooth block 14 that engages with the rack 10 is fixedly installed on the other end of the stainless steel spring 13.

[0040] The rack 10 is provided with a plurality of oblique tooth grooves distributed at equal distances, the oblique tooth grooves are provided with oblique openings facing the openings of the flange connector 2, the oblique angle is thirty degrees, and the tooth block 14 at one end in the oblique tooth groove is matched with the shape and size of the oblique tooth groove.

[0041] The oblique tooth groove is a right-angled trapezoid, and the right angle design facilitates the movement of the tooth block 14 and prevents the tooth block 14 from moving back.

[0042] When the sealing piston rod 8 is in a fully extended state in the piston cylinder 7, the tooth block 14 is not separated from the rack 10.

[0043] Please refer to Figures 5-6 The mobile sealing structure in the embodiment is provided with a hydraulic assembly for driving the movement of the mobile sealing structure.

[0044] It should be noted that the hydraulic assembly includes a hydraulic storage connecting piece and a pressing piece.

[0045] The hydraulic storage connecting piece includes a connecting pipe 15 connected between the hollow ring seats 6 and a hydraulic oil storage cylinder 18 fixedly installed on the surface of the valve cover 3, and a hose 17 is connected between the bottom surface of the hydraulic oil storage cylinder 18 and the connecting pipe 15.

[0046] The pressing piece includes a cover fixedly installed on the opening of the hydraulic oil storage cylinder 18, an electric push rod 19 fixedly installed on the cover, and a sealing piston disc 16 fixedly installed on the push rod of the electric push rod 19 and tightly fitted with the inner wall of the hydraulic oil storage cylinder 18.

[0047] Opening the cover facilitates the supplement of hydraulic oil in the hydraulic oil storage cylinder 18.

[0048] The working principle of the above embodiment is as follows:

[0049] When the sealing leaks, the electric push rod 19 is started to work to push the pipe sealing piston disc 16 to tightly fit the hydraulic oil storage cylinder 18 and move downward to press the hydraulic oil, at the same time, the mutual connection among the hydraulic oil storage cylinder 18, the hose 17, the connecting pipe 15, the hollow ring seat 6 and the piston cylinder 7 makes the hydraulic oil press the sealing piston rod 8 to move, so as to tightly fit the sealing block 9 on the sealing piston rod 8 with the inner wall of the stainless steel valve body shell 1, thereby realizing the adjustment sealing after the leakage and avoiding the need to disassemble the valve cover 3 to disassemble and replace the entire valve plate 5.

[0050] In addition, during the movement adjustment of the sealing block 9, the hollow seat 12 on the connecting rod 11 is synchronously moved, and the elastic expansion and contraction of the stainless steel spring 13 and the inclined tooth groove design of the rack 10 are matched, so that the stainless steel spring 13 is self-adaptively expanded and contracted during the movement of the hollow seat 12, the tooth block 14 is moved in the inclined tooth groove of the rack 10, and is locked to the rack 10 after the adjustment movement, so that the adjustment is fixed, and the displacement does not affect the sealing effect.

[0051] The electrical components appearing in the text are electrically connected with the main controller and the power supply. The main controller can be a conventional known device such as a computer for control, and the existing disclosed power connection technology is not described herein.

Claims

1. A stainless steel gate valve, comprising a stainless steel valve body shell (1), a flange connector (2), a valve cover (3), a threaded valve rod (4) and a valve plate (5); The opposite sides of the stainless steel valve body shell (1) are communicated with the flange connector (2), the upper surface of the stainless steel valve body shell (1) is provided with the valve cover (3), the threaded valve rod (4) is rotatably arranged between the valve cover (3) and the bottom wall of the stainless steel valve body shell (1), and the outer threaded portion of the threaded valve rod (4) is connected with the valve plate (5); characterized in that The opposite sides of the valve plate (5) are provided with movable sealing structures which can be in close contact with the inner wall of the stainless steel valve body shell (1) and seal the opening of the flange connector (2). The movable sealing structure is provided with a locking assembly for locking after adjusting the movement of the movable sealing structure. The movable sealing structure is provided with a hydraulic assembly for driving the movement of the movable sealing structure.

2. A stainless steel gate valve as defined in claim 1, wherein: The movable sealing structure comprises a hollow ring seat (6) installed on the opposite sides of the valve plate (5) and opposite to the opening of the flange connector (2), a plurality of piston cylinders (7) are communicated with the outside of the hollow ring seat (6), a sealing piston rod (8) is slidably arranged in the inside of the piston cylinder (7) and is not separated from the piston cylinder (7), and a sealing block (9) is installed between the other end of the sealing piston rod (8).

3. A stainless steel gate valve as defined in claim 2, wherein: The locking assembly comprises a plurality of racks (10) installed on the upper and lower ends of the left and right sides of the valve plate (5) and a plurality of connecting rods (11) installed on the opposite surfaces of the sealing block (9) and opposite to the racks (10) one by one, the other end of the connecting rod (11) is provided with a hollow seat (12), a plurality of stainless steel springs (13) are installed in the inside of the hollow seat (12), the other end of the stainless steel spring (13) is provided with a gear block (14) engaged with the rack (10).

4. A stainless steel gate valve as defined in claim 3, wherein: A plurality of inclined tooth grooves are distributed at equal distances on the rack (10), the inclined opening of the inclined tooth groove is arranged towards the opening of the flange connector (2), the inclined angle is thirty degrees, and the one end of the gear block (14) located in the inclined tooth groove is matched with the shape and size of the inclined tooth groove.

5. A stainless steel gate valve as defined in claim 4, wherein: When the sealing piston rod (8) is in a fully stretched state in the piston cylinder (7), the gear block (14) is not separated from the rack (10).

6. A stainless steel gate valve as defined in claim 2, wherein: The hydraulic assembly comprises a hydraulic storage communication member and an extrusion member. The hydraulic storage communication member comprises a connecting pipe (15) communicated between the hollow ring seats (6) and a hydraulic oil storage cylinder (18) installed on the surface of the valve cover (3), and a hose (17) is communicated between the bottom end surface of the hydraulic oil storage cylinder (18) and the connecting pipe (15).

7. A stainless steel gate valve as defined in claim 6, wherein: The extrusion member comprises a cover installed on the opening of the hydraulic oil storage cylinder (18), the cover is provided with an electric push rod (19), and the push rod of the electric push rod (19) is provided with a sealing piston disc (16) closely contacting with the inner wall of the hydraulic oil storage cylinder (18).

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